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Programming language: Go
License: MIT License
Tags: Testing     Testing Frameworks    
Latest version: v0.3.2

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README

testza ๐Ÿ• Testza is like pizza for Go - you could live without it, but why should you?

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๐Ÿ“ฆ Installation

# Execute this command inside your project
go get github.com/MarvinJWendt/testza

๐Ÿ“ Description

Testza is a full-featured testing framework for Go. It integrates with the default test runner, so you can use it with the standard go test tool. Testza contains easy to use methods, like assertions, output capturing, fuzzing, and much more.

The main goal of testza is to provide an easy and fun experience writing tests and providing a nice, user-friendly output. Even developers who never used testza, will get into it quickly.

โญ Features

Feature Description
Assertions Assertions allow you to quickly check objects for expected values.
Fuzzing Fuzzing allows you to check functions against sets of generated input parameters.A couple lines of test code can run thousands of sanity tests.
Output Capture Capture and validate output written to the terminal.Perfect for CLI tools.
Snapshots Snapshot objects between test runs, to ensure a consistent behaviour.
Clean Output Clean and colorful output provides you the needed details in an easy-to-understand format.
System Information Testza prints information about the system on startup. You can quickly figure out what's wrong, when a user submits an issue.
Well Documented Every function of testza is well documented and contains an example to make usage super easy.
Customizable Testza features customizable settings, if you want to change something.

๐Ÿš€ Getting Started

See the examples below for a quick introduction!

// --- Some Examples ---

// - Some assertions -
testza.AssertTrue(t, true) // -> Pass
testza.AssertNoError(t, err) // -> Pass
testza.AssertEqual(t, object, object) // -> Pass
// ...

// - Testing console output -
// Test the output of your CLI tool easily!
terminalOutput, _ := testza.CaptureStdout(func(w io.Writer) error {fmt.Println("Hello"); return nil})
testza.AssertEqual(t, terminalOutput, "Hello\n") // -> Pass

// - Fuzzing -
// Testing a function that accepts email addresses as a parameter:

// Testset of many different email addresses
emailAddresses := testza.FuzzStringEmailAddresses()

// Run a test for every string in the test set
testza.FuzzStringRunTests(t, emailAddresses, func(t *testing.T, index int, str string) {
  user, domain, err := internal.ParseEmailAddress(str) // Use your function
  testza.AssertNoError(t, err) // Assert that your function does not return an error
  testza.AssertNotZero(t, user) // Assert that the user is returned
  testza.AssertNotZero(t, domain) // Assert that the domain is returned
})

// And that's just a few examples of what you can do with Testza!

๐Ÿ“š Documentation

<!-- docs:start --> Module Methods Settings

Click to expand

Assert

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Capture

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Fuzz Booleans

Click to expand

Fuzz Strings

Click to expand

Fuzz Float64s

Click to expand

Fuzz Integers

Click to expand

Snapshot

Click to expand

Assert

AssertCompletesIn

func AssertCompletesIn(t testRunner, duration time.Duration, f func(), msg ...interface{})

AssertCompletesIn asserts that a function completes in a given time. Use this function to test that functions do not take too long to complete.

NOTE: Every system takes a different amount of time to complete a function. Do not set the duration too low, if you want consistent results.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertCompletesIn(t, 2 * time.Second, func() {
    // some code that should take less than 2 seconds...
}) // => PASS

AssertContains

func AssertContains(t testRunner, object, element interface{}, msg ...interface{})

AssertContains asserts that a string/list/array/slice/map contains the specified element.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertContains(t, []int{1,2,3}, 2)
testza.AssertContains(t, []string{"Hello", "World"}, "World")
testza.AssertContains(t, "Hello, World!", "World")

AssertDecreasing

func AssertDecreasing(t testRunner, object interface{}, msg ...interface{})

AssertDecreasing asserts that the values in a slice are decreasing. the test fails if the values are not in a slice or if the values are not comparable.

Valid input kinds are: []int, []int8, []int16, []int32, []int64, []uint, []uint8, []uint16, []uint32, []uint64, []float32, []float64.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertDecreasing(t, []int{1000, 137, 2, 1})
testza.AssertDecreasing(t, []float32{13.5, 7, 0.1, -10.3})

AssertDirEmpty

func AssertDirEmpty(t testRunner, dir string, msg ...interface{})

AssertDirEmpty asserts that a directory is empty. The test will pass when the directory is empty or does not exist.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertDirEmpty(t, "FolderName")

AssertDirExist

func AssertDirExist(t testRunner, dir string, msg ...interface{})

AssertDirExist asserts that a directory exists. The test will pass when the directory exists, and it's visible to the current user. The test will fail, if the path points to a file.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertDirExist(t, "FolderName")

AssertDirNotEmpty

func AssertDirNotEmpty(t testRunner, dir string, msg ...interface{})

AssertDirNotEmpty asserts that a directory is not empty The test will pass when the directory is not empty and will fail if the directory does not exist.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertDirNotEmpty(t, "FolderName")

AssertEqual

func AssertEqual(t testRunner, expected interface{}, actual interface{}, msg ...interface{})

AssertEqual asserts that two objects are equal.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertEqual(t, "Hello, World!", "Hello, World!")
testza.AssertEqual(t, true, true)

AssertEqualValues

func AssertEqualValues(t testRunner, expected interface{}, actual interface{}, msg ...interface{})

AssertEqualValues asserts that two objects have equal values. The order of the values is also validated.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertEqualValues(t, []string{"Hello", "World"}, []string{"Hello", "World"})
testza.AssertEqualValues(t, []int{1,2}, []int{1,2})
testza.AssertEqualValues(t, []int{1,2}, []int{2,1}) // FAILS (wrong order)

Comparing struct values:

person1 := Person{
  Name:   "Marvin Wendt",
  Age:    20,
  Gender: "male",
}

person2 := Person{
  Name:   "Marvin Wendt",
  Age:    20,
  Gender: "male",
}

testza.AssertEqualValues(t, person1, person2)

AssertErrorIs

func AssertErrorIs(t testRunner, err, target error, msg ...interface{})

AssertErrorIs asserts that target is inside the error chain of err.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

var testErr = errors.New("hello world")
var testErrWrapped = fmt.Errorf("test err: %w", testErr)
testza.AssertErrorIs(t, testErrWrapped ,testErr)

AssertFalse

func AssertFalse(t testRunner, value interface{}, msg ...interface{})

AssertFalse asserts that an expression or object resolves to false.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertFalse(t, false)
testza.AssertFalse(t, 1 == 2)
testza.AssertFalse(t, 2 != 2)
testza.AssertFalse(t, 1 > 5 && 4 < 0)

AssertFileExists

func AssertFileExists(t testRunner, file string, msg ...interface{})

AssertFileExists asserts that a file exists.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertFileExists(t, "./test.txt")
testza.AssertFileExists(t, "./config.yaml", "the config file is missing")

AssertGreater

func AssertGreater(t testRunner, object1, object2 interface{}, msg ...interface{})

AssertGreater asserts that the first object is greater than the second.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertGreater(t, 5, 1)
testza.AssertGreater(t, 10, -10)

AssertImplements

func AssertImplements(t testRunner, interfaceObject, object interface{}, msg ...interface{})

AssertImplements asserts that an objects implements an interface.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertImplements(t, (*YourInterface)(nil), new(YourObject))
testza.AssertImplements(t, (*fmt.Stringer)(nil), new(types.Const)) => pass

AssertIncreasing

func AssertIncreasing(t testRunner, object interface{}, msg ...interface{})

AssertIncreasing asserts that the values in a slice are increasing. the test fails if the values are not in a slice or if the values are not comparable.

Valid input kinds are: []int, []int8, []int16, []int32, []int64, []uint, []uint8, []uint16, []uint32, []uint64, []float32, []float64.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertIncreasing(t, []int{1, 2, 137, 1000})
testza.AssertIncreasing(t, []float32{-10.3, 0.1, 7, 13.5})

AssertKindOf

func AssertKindOf(t testRunner, expectedKind reflect.Kind, object interface{}, msg ...interface{})

AssertKindOf asserts that the object is a type of kind exptectedKind.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertKindOf(t, reflect.Slice, []int{1,2,3})
testza.AssertKindOf(t, reflect.Slice, []string{"Hello", "World"})
testza.AssertKindOf(t, reflect.Int, 1337)
testza.AssertKindOf(t, reflect.Bool, true)
testza.AssertKindOf(t, reflect.Map, map[string]bool{})

AssertLen

func AssertLen(t testRunner, object interface{}, length int, msg ...interface{})

AssertLen asserts that the length of an object is equal to the given length.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertLen(t, "abc", 3)
testza.AssertLen(t, "Assert", 6)
testza.AssertLen(t, []int{1, 2, 1337, 25}, 4)
testza.AssertLen(t, map[string]int{"asd": 1, "test": 1337}, 2)

AssertLess

func AssertLess(t testRunner, object1, object2 interface{}, msg ...interface{})

AssertLess asserts that the first object is less than the second.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertLess(t, 1, 5)
testza.AssertLess(t, -10, 10)

AssertNil

func AssertNil(t testRunner, object interface{}, msg ...interface{})

AssertNil asserts that an object is nil.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertNil(t, nil)

AssertNoDirExists

func AssertNoDirExists(t testRunner, dir string, msg ...interface{})

AssertNoDirExists asserts that a directory does not exists. The test will pass, if the path points to a file, as a directory with the same name, cannot exist.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertNoDirExists(t, "FolderName")

AssertNoError

func AssertNoError(t testRunner, err error, msg ...interface{})

AssertNoError asserts that an error is nil.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

err := nil
testza.AssertNoError(t, err)

AssertNoFileExists

func AssertNoFileExists(t testRunner, file string, msg ...interface{})

AssertNoSubset

func AssertNoSubset(t testRunner, list interface{}, subset interface{}, msg ...interface{})

AssertNoSubset asserts that the second parameter is not a subset of the list. The order is irrelevant.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertNoSubset(t, []int{1, 2, 3}, []int{1, 7})
testza.AssertNoSubset(t, []string{"Hello", "World", "Test"}, []string{"Test", "John"})

AssertNotCompletesIn

func AssertNotCompletesIn(t testRunner, duration time.Duration, f func(), msg ...interface{})

AssertNotCompletesIn asserts that a function does not complete in a given time. Use this function to test that functions do not complete to quickly. For example if your database connection completes in under a millisecond, there might be something wrong.

NOTE: Every system takes a different amount of time to complete a function. Do not set the duration too high, if you want consistent results.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertNotCompletesIn(t, 2 * time.Second, func() {
    // some code that should take more than 2 seconds...
    time.Sleep(3 * time.Second)
}) // => PASS

AssertNotContains

func AssertNotContains(t testRunner, object, element interface{}, msg ...interface{})

AssertNotContains asserts that a string/list/array/slice/map does not contain the specified element.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertNotContains(t, []string{"Hello", "World"}, "Spaceship")
testza.AssertNotContains(t, "Hello, World!", "Spaceship")

AssertNotEqual

func AssertNotEqual(t testRunner, expected interface{}, actual interface{}, msg ...interface{})

AssertNotEqual asserts that two objects are not equal.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertNotEqual(t, true, false)
testza.AssertNotEqual(t, "Hello", "World")

AssertNotEqualValues

func AssertNotEqualValues(t testRunner, expected interface{}, actual interface{}, msg ...interface{})

AssertNotEqualValues asserts that two objects do not have equal values.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertNotEqualValues(t, []int{1,2}, []int{3,4})

Comparing struct values:

person1 := Person{
  Name:   "Marvin Wendt",
  Age:    20,
  Gender: "male",
}

person2 := Person{
  Name:   "Marvin Wendt",
  Age:    20,
  Gender: "female", // <-- CHANGED
}

testza.AssertNotEqualValues(t, person1, person2)

AssertNotErrorIs

func AssertNotErrorIs(t testRunner, err, target error, msg ...interface{})

AssertNotErrorIs

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

var testErr = errors.New("hello world")
var test2Err = errors.New("hello world 2")
var testErrWrapped = fmt.Errorf("test err: %w", testErr)
testza.AssertNotErrorIs(t, testErrWrapped, test2Err)

AssertNotImplements

func AssertNotImplements(t testRunner, interfaceObject, object interface{}, msg ...interface{})

AssertNotImplements asserts that an object does not implement an interface.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertNotImplements(t, (*YourInterface)(nil), new(YourObject))
testza.AssertNotImplements(t, (*fmt.Stringer)(nil), new(types.Const)) => fail, because types.Const does implement fmt.Stringer.

AssertNotKindOf

func AssertNotKindOf(t testRunner, kind reflect.Kind, object interface{}, msg ...interface{})

AssertNotKindOf asserts that the object is not a type of kind kind.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertNotKindOf(t, reflect.Slice, "Hello, World")
testza.AssertNotKindOf(t, reflect.Slice, true)
testza.AssertNotKindOf(t, reflect.Int, 13.37)
testza.AssertNotKindOf(t, reflect.Bool, map[string]bool{})
testza.AssertNotKindOf(t, reflect.Map, false)

AssertNotNil

func AssertNotNil(t testRunner, object interface{}, msg ...interface{})

AssertNotNil asserts that an object is not nil.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertNotNil(t, true)
testza.AssertNotNil(t, "Hello, World!")
testza.AssertNotNil(t, 0)

AssertNotNumeric

func AssertNotNumeric(t testRunner, object interface{}, msg ...interface{})

AssertNotNumeric checks if the object is not a numeric type. Numeric types are: Int, Int8, Int16, Int32, Int64, Float32, Float64, Uint, Uint8, Uint16, Uint32, Uint64, Complex64 and Complex128.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertNotNumeric(t, true)
testza.AssertNotNumeric(t, "123")

AssertNotPanics

func AssertNotPanics(t testRunner, f func(), msg ...interface{})

AssertNotPanics asserts that a function does not panic.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertNotPanics(t, func() {
    // some code that does not call a panic...
}) // => PASS

AssertNotRegexp

func AssertNotRegexp(t testRunner, regex interface{}, txt interface{}, msg ...interface{})

AssertNotRegexp asserts that a string does not match a given regexp.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertNotRegexp(t, "ab.*", "Hello, World!")

AssertNotSameElements

func AssertNotSameElements(t testRunner, expected interface{}, actual interface{}, msg ...interface{})

AssertNotSameElements asserts that two slices contains same elements (including pointers). The order is irrelevant.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

 testza.AssertNotSameElements(t, []string{"Hello", "World"}, []string{"Hello", "World", "World"})
 testza.AssertNotSameElements(t, []int{1,2}, []int{1,2,3})

 type A struct {
      a string
 }
 testza.AssertNotSameElements(t, []*A{{a: "A"}, {a: "B"}, {a: "C"}}, []*A{{a: "A"}, {a: "B"}, {a: "C"}, {a: "D"}})

AssertNotZero

func AssertNotZero(t testRunner, value interface{}, msg ...interface{})

AssertNotZero asserts that the value is not the zero value for it's type.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertNotZero(t, 1337)
testza.AssertNotZero(t, true)
testza.AssertNotZero(t, "Hello, World")

AssertNumeric

func AssertNumeric(t testRunner, object interface{}, msg ...interface{})

AssertNumeric asserts that the object is a numeric type. Numeric types are: Int, Int8, Int16, Int32, Int64, Float32, Float64, Uint, Uint8, Uint16, Uint32, Uint64, Complex64 and Complex128.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertNumeric(t, 123)
testza.AssertNumeric(t, 1.23)
testza.AssertNumeric(t, uint(123))

AssertPanics

func AssertPanics(t testRunner, f func(), msg ...interface{})

AssertPanics asserts that a function panics.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertPanics(t, func() {
    // ...
    panic("some panic")
}) // => PASS

AssertRegexp

func AssertRegexp(t testRunner, regex interface{}, txt interface{}, msg ...interface{})

AssertRegexp asserts that a string matches a given regexp.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertRegexp(t, "^a.*c$", "abc")

AssertSameElements

func AssertSameElements(t testRunner, expected interface{}, actual interface{}, msg ...interface{})

AssertSameElements asserts that two slices contains same elements (including pointers). The order is irrelevant.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

 testza.AssertSameElements(t, []string{"Hello", "World"}, []string{"Hello", "World"})
 testza.AssertSameElements(t, []int{1,2,3}, []int{1,2,3})
 testza.AssertSameElements(t, []int{1,2}, []int{2,1})

 type A struct {
      a string
 }
 testza.AssertSameElements(t, []*A{{a: "A"}, {a: "B"}, {a: "C"}}, []*A{{a: "A"}, {a: "B"}, {a: "C"}})

AssertSubset

func AssertSubset(t testRunner, list interface{}, subset interface{}, msg ...interface{})

AssertSubset asserts that the second parameter is a subset of the list. The order is irrelevant.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertSubset(t, []int{1, 2, 3}, []int{1, 2})
testza.AssertSubset(t, []string{"Hello", "World", "Test"}, []string{"Test", "World"})

AssertTestFails

func AssertTestFails(t testRunner, test func(t TestingPackageWithFailFunctions), msg ...interface{})

AssertTestFails asserts that a unit test fails. A unit test fails if one of the following methods is called in the test function: Error, Errorf, Fail, FailNow, Fatal, Fatalf

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertTestFails(t, func(t testza.TestingPackageWithFailFunctions) {
    testza.AssertTrue(t, false)
}) // => Pass

testza.AssertTestFails(t, func(t testza.TestingPackageWithFailFunctions) {
    // ...
    t.Fail() // Or any other failing method.
}) // => Pass

AssertTrue

func AssertTrue(t testRunner, value interface{}, msg ...interface{})

AssertTrue asserts that an expression or object resolves to true.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertTrue(t, true)
testza.AssertTrue(t, 1 == 1)
testza.AssertTrue(t, 2 != 3)
testza.AssertTrue(t, 1 > 0 && 4 < 5)

AssertZero

func AssertZero(t testRunner, value interface{}, msg ...interface{})

AssertZero asserts that the value is the zero value for it's type.

When using a custom message, the same formatting as with fmt.Sprintf() is used.

Example:

testza.AssertZero(t, 0)
testza.AssertZero(t, false)
testza.AssertZero(t, "")

Capture

CaptureStderr

func CaptureStderr(capture func(w io.Writer) error) (string, error)

CaptureStderr captures everything written to stderr from a specific function. You can use this method in tests, to validate that your functions writes a string to the terminal.

Example:

stderr, err := testza.CaptureStderr(func(w io.Writer) error {
    _, err := fmt.Fprint(os.Stderr, "Hello, World!")
    testza.AssertNoError(t, err)
    return nil
})

testza.AssertNoError(t, err)
testza.AssertEqual(t, "Hello, World!", stderr)

CaptureStdout

func CaptureStdout(capture func(w io.Writer) error) (string, error)

CaptureStdout captures everything written to stdout from a specific function. You can use this method in tests, to validate that your functions writes a string to the terminal.

Example:

stdout, err := testza.CaptureStdout(func(w io.Writer) error {
    fmt.Println("Hello, World!")
    return nil
})

testza.AssertNoError(t, err)
testza.AssertEqual(t, "Hello, World!", stdout)

CaptureStdoutAndStderr

func CaptureStdoutAndStderr(capture func(stdoutWriter, stderrWriter io.Writer) error) (stdout, stderr string, err error)

CaptureStdoutAndStderr captures everything written to stdout and stderr from a specific function. You can use this method in tests, to validate that your functions writes a string to the terminal.

Example:

stdout, stderr, err := testza.CaptureStdoutAndStderr(func(stdoutWriter, stderrWriter io.Writer) error {
    fmt.Fprint(os.Stdout, "Hello")
    fmt.Fprint(os.Stderr, "World")
    return nil
})

testza.AssertNoError(t, err)
testza.AssertEqual(t, "Hello", stdout)
testza.AssertEqual(t, "World", stderr)

Fuzz Booleans

FuzzInputBoolFull

func FuzzInputBoolFull() []bool

FuzzInputBoolFull returns true and false in a boolean slice.

FuzzInputBoolModify

func FuzzInputBoolModify(inputSlice []bool, modifier func(index int, value bool) bool) (floats []bool)

FuzzInputBoolModify returns a modified version of a test set.

Example:

testset := testza.FuzzInputBoolModify(testza.FuzzInputBoolFull(), func(index int, value bool) bool {
    return !value
})

FuzzInputBoolRunTests

func FuzzInputBoolRunTests(t testRunner, testSet []bool, testFunc func(t *testing.T, index int, f bool))

FuzzInputBoolRunTests runs a test for every value in a testset. You can use the value as input parameter for your functions, to sanity test against many different cases. This ensures that your functions have a correct error handling and enables you to test against hunderts of cases easily.

Example:

testza.FuzzInputBoolRunTests(t, testza.FuzzInputBoolFull(), func(t *testing.T, index int, b bool) {
    // Test logic
    // err := YourFunction(b)
    // testza.AssertNoError(t, err)
    // ...
})

Fuzz Float64s

FuzzInputFloat64Full

func FuzzInputFloat64Full() (floats []float64)

FuzzInputFloat64Full returns a combination of every float64 testset and some random float64s (positive and negative).

FuzzInputFloat64GenerateRandomNegative

func FuzzInputFloat64GenerateRandomNegative(count int, min float64) (floats []float64)

FuzzInputFloat64GenerateRandomNegative generates random negative integers with a minimum of min. If the minimum is positive, it will be converted to a negative number. If it is set to 0, there is no limit.

FuzzInputFloat64GenerateRandomPositive

func FuzzInputFloat64GenerateRandomPositive(count int, max float64) (floats []float64)

FuzzInputFloat64GenerateRandomPositive generates random positive integers with a maximum of max. If the maximum is 0, or below, the maximum will be set to math.MaxInt64.

FuzzInputFloat64GenerateRandomRange

func FuzzInputFloat64GenerateRandomRange(count int, min, max float64) (floats []float64)

FuzzInputFloat64GenerateRandomRange generates random positive integers with a maximum of max. If the maximum is 0, or below, the maximum will be set to math.MaxInt64.

FuzzInputFloat64Modify

func FuzzInputFloat64Modify(inputSlice []float64, modifier func(index int, value float64) float64) (floats []float64)

FuzzInputFloat64Modify returns a modified version of a test set.

Example:

testset := testza.FuzzInputFloat64Modify(testza.FuzzInputFloat64Full(), func(index int, value float64) float64 {
    return value * 2
})

FuzzInputFloat64RunTests

func FuzzInputFloat64RunTests(t testRunner, testSet []float64, testFunc func(t *testing.T, index int, f float64))

FuzzInputFloat64RunTests runs a test for every value in a testset. You can use the value as input parameter for your functions, to sanity test against many different cases. This ensures that your functions have a correct error handling and enables you to test against hunderts of cases easily.

Example:

testza.FuzzInputFloat64RunTests(t, testza.FuzzInputFloat64Full(), func(t *testing.T, index int, f float64) {
    // Test logic
    // err := YourFunction(f)
    // testza.AssertNoError(t, err)
    // ...
})

Fuzz Integers

FuzzInputIntFull

func FuzzInputIntFull() (ints []int)

FuzzInputIntFull returns a combination of every integer testset and some random integers (positive and negative).

FuzzInputIntGenerateRandomNegative

func FuzzInputIntGenerateRandomNegative(count, min int) (ints []int)

FuzzInputIntGenerateRandomNegative generates random negative integers with a minimum of min. If the minimum is 0, or above, the maximum will be set to math.MinInt64.

FuzzInputIntGenerateRandomPositive

func FuzzInputIntGenerateRandomPositive(count, max int) (ints []int)

FuzzInputIntGenerateRandomPositive generates random positive integers with a maximum of max. If the maximum is 0, or below, the maximum will be set to math.MaxInt64.

FuzzInputIntGenerateRandomRange

func FuzzInputIntGenerateRandomRange(count, min, max int) (ints []int)

FuzzInputIntGenerateRandomRange generates random integers with a range of min to max.

FuzzInputIntModify

func FuzzInputIntModify(inputSlice []int, modifier func(index int, value int) int) (ints []int)

FuzzInputIntModify returns a modified version of a test set.

Example:

testset := testza.FuzzInputIntModify(testza.FuzzInputIntFull(), func(index int, value int) int {
    return value * 2
})

FuzzInputIntRunTests

func FuzzInputIntRunTests(t testRunner, testSet []int, testFunc func(t *testing.T, index int, i int))

FuzzInputIntRunTests runs a test for every value in a testset. You can use the value as input parameter for your functions, to sanity test against many different cases. This ensures that your functions have a correct error handling and enables you to test against hunderts of cases easily.

Example:

testza.FuzzInputIntRunTests(t, testza.FuzzInputIntFull(), func(t *testing.T, index int, i int) {
    // Test logic
    // err := YourFunction(i)
    // testza.AssertNoError(t, err)
    // ...
})

Fuzz Strings

FuzzInputStringEmailAddresses

func FuzzInputStringEmailAddresses() []string

FuzzInputStringEmailAddresses returns a test set with valid email addresses. The addresses may look like they are invalid, but they are all conform to RFC 2822 and could be used. You can use this test set to test your email validation process.

FuzzInputStringEmpty

func FuzzInputStringEmpty() []string

FuzzInputStringEmpty returns a test set with a single empty string.

FuzzInputStringFull

func FuzzInputStringFull() (ret []string)

FuzzInputStringFull contains all string test sets plus ten generated random strings. This test set is huge and should only be used if you want to make sure that no string, at all, can crash a process.

FuzzInputStringGenerateRandom

func FuzzInputStringGenerateRandom(count, length int) (result []string)

FuzzInputStringGenerateRandom returns random strings in a test set.

FuzzInputStringHtmlTags

func FuzzInputStringHtmlTags() []string

FuzzInputStringHtmlTags returns a test set with different html tags.

Example:

- <script>
- <script>alert('XSS')</script>
- <a href="https://github.com/MarvinJWendt/testza">link</a>

FuzzInputStringLimit

func FuzzInputStringLimit(testSet []string, max int) []string

FuzzInputStringLimit limits a test set in size.

FuzzInputStringLong

func FuzzInputStringLong() (testSet []string)

FuzzInputStringLong returns a test set with long random strings. Returns: [0]: Random string (length: 25) [1]: Random string (length: 50) [2]: Random string (length: 100) [3]: Random string (length: 1,000) [4]: Random string (length: 100,000)

FuzzInputStringModify

func FuzzInputStringModify(inputSlice []string, modifier func(index int, value string) string) (ret []string)

FuzzInputStringModify returns a modified version of a test set.

Example:

testset := testza.FuzzInputStringModify(testza.FuzzInputStringFull(), func(index int, value string) string {
    return value + " some suffix"
})

FuzzInputStringNumeric

func FuzzInputStringNumeric() []string

FuzzInputStringNumeric returns a test set with strings that are numeric. The highest number in here is "9223372036854775807", which is equal to the maxmim int64.

FuzzInputStringRunTests

func FuzzInputStringRunTests(t testRunner, testSet []string, testFunc func(t *testing.T, index int, str string))

FuzzInputStringRunTests runs a test for every value in a testset. You can use the value as input parameter for your functions, to sanity test against many different cases. This ensures that your functions have a correct error handling and enables you to test against hunderts of cases easily.

Example:

testza.FuzzInputStringRunTests(t, testza.FuzzInputStringFull(), func(t *testing.T, index int, str string) {
    // Test logic
    // err := YourFunction(str)
    // testza.AssertNoError(t, err)
    // ...
})

FuzzInputStringUsernames

func FuzzInputStringUsernames() []string

FuzzInputStringUsernames returns a test set with usernames.

Settings

SetColorsEnabled

func SetColorsEnabled(enabled bool)

SetColorsEnabled controls if testza should print colored output. You should use this in the init() method of the package, which contains your tests.

Example:

init() {
  testza.SetColorsEnabled(false) // Disable colored output
  testza.SetColorsEnabled(true)  // Enable colored output
}

SetDiffContextLines

func SetDiffContextLines(lines int)

SetDiffContextLines controls how many lines are shown around a changed diff line. If set to -1 it will show full diff. You should use this in the init() method of the package, which contains your tests.

Example:

init() {
  testza.SetDiffContextLines(-1) // Show all diff lines
  testza.SetDiffContextLines(3)  // Show 3 lines around every changed line
}

SetLineNumbersEnabled

func SetLineNumbersEnabled(enabled bool)

SetLineNumbersEnabled controls if line numbers should be printed in failing tests. You should use this in the init() method of the package, which contains your tests.

Example:

init() {
  testza.SetLineNumbersEnabled(false) // Disable line numbers
  testza.SetLineNumbersEnabled(true)  // Enable line numbers
}

SetRandomSeed

func SetRandomSeed(seed int64)

SetRandomSeed sets the seed for the random generator used in testza. Using the same seed will result in the same random sequences each time and guarantee a reproducible test run. Use this setting, if you want a 100% deterministic test. You should use this in the init() method of the package, which contains your tests.

Example:

init() {
  testza.SetRandomSeed(1337) // Set the seed to 1337
  testza.SetRandomSeed(time.Now().UnixNano()) // Set the seed back to the current time (default | non-deterministic)
}

SetShowStartupMessage

func SetShowStartupMessage(show bool)

SetShowStartupMessage controls if the startup message should be printed. You should use this in the init() method of the package, which contains your tests.

Example:

init() {
  testza.SetShowStartupMessage(false) // Disable the startup message
  testza.SetShowStartupMessage(true)  // Enable the startup message
}

Snapshot

SnapshotCreate

func SnapshotCreate(name string, snapshotObject interface{}) error

SnapshotCreate creates a snapshot of an object, which can be validated in future test runs. Using this function directly will override previous snapshots with the same name. You most likely want to use SnapshotCreateOrValidate.

NOTICE: \r\n will be replaced with \n to make the files consistent between operating systems.

Example:

testza.SnapshotCreate(t.Name(), objectToBeSnapshotted)

SnapshotCreateOrValidate

func SnapshotCreateOrValidate(t testRunner, name string, object interface{}, msg ...interface{}) error

SnapshotCreateOrValidate creates a snapshot of an object which can be used in future test runs. It is good practice to name your snapshots the same as the test they are created in. You can do that automatically by using t.Name() as the second parameter, if you are using the inbuilt test system of Go. If a snapshot already exists, the function will not create a new one, but validate the exisiting one. To re-create a snapshot, you can delete the according file in /testdata/snapshots/.

NOTICE: \r\n will be replaced with \n to make the files consistent between operating systems.

Example:

testza.SnapshotCreateOrValidate(t, t.Name(), object)
testza.SnapshotCreateOrValidate(t, t.Name(), object, "Optional Message")

SnapshotValidate

func SnapshotValidate(t testRunner, name string, actual interface{}, msg ...interface{}) error

SnapshotValidate validates an already exisiting snapshot of an object. You most likely want to use SnapshotCreateOrValidate.

NOTICE: \r\n will be replaced with \n to make the files consistent between operating systems.

Example:

testza.SnapshotValidate(t, t.Name(), objectToBeValidated)
testza.SnapshotValidate(t, t.Name(), objectToBeValidated, "Optional message")

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